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Multiplexers provide higher data rates without compromising signal integrity

Phoenix, Ariz. —ON Semiconductor has expanded its multiplexer product line with devices that are designed to function at high input rates/clock frequencies.

The NB6VQ572M, NB6LQ572, NB7L572, NB6L572M, NB7LQ572, NB6LQ572M, NB7VQ58M and NB7V58M mux/fanout devices are targeted at SONET, Gigabit Ethernet, Fiber Channel, backplane and other clock/data distribution applications.

The NB6VQ572M and NB6LQ572M differential 4:1 clock/data input multiplexers with 1:2 current mode logic (CML) clock/data fanout buffers operate at up to 6 GHz/8 Gbps from a 1.8 V, 2.5 V or 3.3 V power supply. The new devices have a data dependent jitter of <10 ps and random clock jitter of less than 0.8 ps RMS.

The NB7L572 and NB6LQ572 differential 4:1 clock/data input multiplexers have a 1:2 low voltage positive emitter coupled logic (LVPECL) clock/data fanout buffer. The device's differential INx/INxb inputs include internal 50 Ω termination resistors and will accept differential LVPECL, low voltage differential signaling (LVDS) or CML logic levels. These devices also incorporate a pair of select pins that will choose one of four differential inputs and produce two identical LVPECL output copies of clock or data operating up to 7 GHz/10 Gbps. This is complemented by the NB6L572M, which has a 1:2 CML clock /data fanout buffer that operates up to 6 GHz/8 Gbps and the NB6LQ572M, which supports the same speeds but incorporates a fixed equalizer receiver on each input pair to enhance the degraded signal transmitted across an FR4 PCB backplane or cable interconnect.

The NB7VQ58M differential 2:1 clock/data multiplexer also has a selectable equalizer receiver. When placed in series with a data path operating up to 10.7 Gbps, it compensates the degraded signal creating a more open eye diagram allowing for higher data rates on standard FR4. The differential inputs of the NB7V58M 2:1 clock/data multiplexer incorporate internal 50 Ω termination resistors that are accessed through the VT pin. This feature allows the device to accept LVPECL, CML and LVDS logic level standards. The NB7V58M produces minimal clock /data jitter and also operates up to 7 GHz/10.7 Gbps. The devices each have a -40°C to +85°C operating temperature range.

The NB6VQ572M, NB6LQ572, NB7L572, NB6L572M, NB7LQ572 and NB6LQ572M are offered in 5mm x 5mm QFN-32 packages. The NB7VQ58M and NB7V58M are offered in a low-profile 3mm x 3mm QFN-16 packages.

Pricing: 1,000 unit quantities at $6.50.
Availability: Now.
Datasheets: NB6VQ572M, NB6LQ572, NB7L572, NB6L572M, NB7LQ572, NB6LQ572M, NB7VQ58M and NB7V58.

On Semiconductor, www.onsemi.com

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